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31 条记录 (耗时 0.014 秒)

    Optical recording and reproducing head
    1.
    发明公开
    Optical recording and reproducing head 失效
    光学记录和复制头

    公开(公告)号：EP0099123A3

    公开(公告)日：1986-08-20

    申请号：EP83106877

    申请日：1983-07-13

    申请人： Matsushita Electric Industrial Co., Ltd.

    发明人： Ohara, Shunji ,  Yoshida, Tomio ,  Satoh, Isao ,  Koishi, Kenji

    IPC分类号： G11B07/12 ,  G11B07/08 ,  G02B27/28

    CPC分类号： G02B27/283 ,  G11B7/08 ,  G11B7/12

    摘要： Disclosed is a method wherein light beams emitted from two light sources are combined together and applied to a recording medium and the light beams reflected from the recording medium are drawn out being separated from each other. The method is such that the wavelengths of the light beams from both the light sources are made different from each other, i.e., λ 1 , X 2 , and the light beams from the light sources are combined together by means of a polarization beam splitter, two quarter wave plates, optical filters and so forth and are then simultaneously focussed by a single focussing lens substantially along the optical axis thereof, thereby allowing microspots of light focussed to be disposed on a disc close to each other. Moreover, the light beams reflected from the disc are drawn out being completely separated from each other by the polarization beam splitter owing to the difference in polarization direction. Further, for example, one of the light beams entering the polarization beam splitter is passed through a magnifier prism having a magnifying surface and a reflecting surface, or one or more cylindrical lenses to magnify the beam diameter only in the direction parallel to the composition surface of a semiconductor laser as the light source thereof, so as to be a light beam of substantially circular cross section. On the other hand, the other light beam is passed through one or more cylindrical lenses to reduce the beam diameter only in the direction parallel to the composition surface of a semiconductor laser as the light source thereof so as to be a light beam of oval cross section. Thereby, a substantially circular microspot of light and an oval microspot of light can be obtained on the disc. Furthermore, the two light sources, the polarization beam splitter and a splitter prism are arranged so that the optical axes of the light beams from both the light sources and the optical axis for drawing out the light reflected from the disc and leading the same to the photodetector are made substantially parallel to each other. Thereby, the optical recording and reproducing head is made more compact.

    Optical and reversible recording and reproducing apparatus
    2.
    发明公开
    Optical and reversible recording and reproducing apparatus 失效
    Gerätzum optischen und umkehrbaren Aufzeichnen oder Wiedergeben。

    公开(公告)号：EP0106673A2

    公开(公告)日：1984-04-25

    申请号：EP83306198.9

    申请日：1983-10-13

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Yoshida, Tomio ,  Satoh, Isao ,  Ohara, Shunji ,  Koishi, Kenji ,  Kuroki, Yuzuru

    IPC分类号： G11B7/00 ,  G11B7/12

    CPC分类号： G11B7/125 ,  G11B7/00557 ,  G11B7/00745 ,  G11B7/08

    摘要： This invention relates to an optical and reversible recording and reproducing apparatus and intends to provide a practical apparatus in which information signals can be recorded, reproduced and erased by irradiating a laser beam and the like on the substrate to be optically recorded. More practically, there is provided such an apparatus wherein two light sources such as lasers having different wavelengths are used, and a first almost circular micro-lightspot is produced by one light source, while a second elliptic lightspot having a longitudinal diameter in the tangential direction of a guide track on a disc is produced by the other light source. These first and second lightspots are closely irradiated on the same guid track of an optical recording disc. The recording and reproducing of the signals are performed using the first lightspot while the erasion of the recorded signals can be made by using the second lightspot or cooperatively using the first and second lightspots.

    摘要翻译： 本发明涉及一种光学和可逆记录和再现装置，并且旨在提供一种实用的装置，其中可以通过在光学记录的基板上照射激光束等来记录，再现和擦除信息信号。 更实际地，提供了这样的装置，其中使用诸如具有不同波长的激光器的两个光源，并且由一个光源产生第一几乎圆形的微光点，而具有沿切线方向的纵向直径的第二椭圆形光点 的光盘上的导轨由另一个光源产生。 这些第一和第二个光点被紧密地照射在光学记录盘的相同的导轨上。 使用第一个光点进行信号的记录和再现，同时可以通过使用第二个光点或协同使用第一个和第二个光点来进行记录的信号的擦除。

    Optical recording and reproducing head
    3.
    发明公开
    Optical recording and reproducing head 失效
    Kopf zum optischen Aufzeichnen und Wiedergeben。

    公开(公告)号：EP0099123A2

    公开(公告)日：1984-01-25

    申请号：EP83106877.0

    申请日：1983-07-13

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Ohara, Shunji ,  Yoshida, Tomio ,  Satoh, Isao ,  Koishi, Kenji

    IPC分类号： G11B7/12 ,  G11B7/08 ,  G02B27/28

    CPC分类号： G02B27/283 ,  G11B7/08 ,  G11B7/12

    摘要： Disclosed is a method wherein light beams emitted from two light sources are combined together and applied to a recording medium and the light beams reflected from the recording medium are drawn out being separated from each other. The method is such that the wavelengths of the light beams from both the light sources are made different from each other, i.e., λ 1 , X 2 , and the light beams from the light sources are combined together by means of a polarization beam splitter, two quarter wave plates, optical filters and so forth and are then simultaneously focussed by a single focussing lens substantially along the optical axis thereof, thereby allowing microspots of light focussed to be disposed on a disc close to each other. Moreover, the light beams reflected from the disc are drawn out being completely separated from each other by the polarization beam splitter owing to the difference in polarization direction. Further, for example, one of the light beams entering the polarization beam splitter is passed through a magnifier prism having a magnifying surface and a reflecting surface, or one or more cylindrical lenses to magnify the beam diameter only in the direction parallel to the composition surface of a semiconductor laser as the light source thereof, so as to be a light beam of substantially circular cross section. On the other hand, the other light beam is passed through one or more cylindrical lenses to reduce the beam diameter only in the direction parallel to the composition surface of a semiconductor laser as the light source thereof so as to be a light beam of oval cross section. Thereby, a substantially circular microspot of light and an oval microspot of light can be obtained on the disc. Furthermore, the two light sources, the polarization beam splitter and a splitter prism are arranged so that the optical axes of the light beams from both the light sources and the optical axis for drawing out the light reflected from the disc and leading the same to the photodetector are made substantially parallel to each other. Thereby, the optical recording and reproducing head is made more compact.

    摘要翻译： 公开了一种方法，其中从两个光源发射的光束被组合在一起并被施加到记录介质上，并且从记录介质反射的光束被拉出以彼此分离。 该方法使得来自两个光源的光束的波长彼此不同，即λ1，λ2，并且来自光源的光束通过偏振分束器组合在一起， 两个四分之一波片，光学滤光片等，然后基本上沿其光轴由单个聚焦透镜同时聚焦，从而允许聚焦的微点被布置在彼此靠近的盘上。 此外，由于偏振方向的差异，从光盘反射的光束被偏振光束分离器完全分离。 此外，例如，进入偏振分束器的光束中的一个通过具有放大表面和反射面的放大镜棱镜或一个或多个柱面透镜，以仅在平行于组成表面的方向上放大光束直径 作为其光源的半导体激光器，以便成为大致圆形横截面的光束。 另一方面，另一方面，另一方的光束通过一个以上的圆柱透镜，仅在平行于作为其光源的半导体激光器的组成表面的方向上减小光束直径，以便成为椭圆形交叉的光束 部分。 由此，可以在盘上获得大致圆形的微小圆点和光的椭圆形微光。 此外，两个光源，偏振分束器和分光棱镜被布置成使得来自光源和光轴的光束的光轴用于从光盘中引出反射的光，并将其引导到 光电检测器基本上彼此平行。 由此，使光记录再现头更加紧凑。

    Optical recording and reproducing disc
    7.
    发明公开
    Optical recording and reproducing disc 失效
    光学记录和复制光盘

    公开(公告)号：EP0081138A3

    公开(公告)日：1983-08-03

    申请号：EP82110852

    申请日：1982-11-24

    申请人： Matsushita Electric Industrial Co., Ltd.

    发明人： Satoh, Isao ,  Yoshida, Tomio ,  Ohara, Shunji ,  Koishi, Kenji

    IPC分类号： G11B07/00 ,  G11B07/08

    CPC分类号： G11B7/24085 ,  G11B7/00745 ,  G11B7/08517 ,  G11B27/19 ,  G11B27/24 ,  G11B27/3027 ,  G11B27/32 ,  G11B2220/20

    摘要： The disclosure is directed to an optical recording and reproducing disc in which each track circumference of guide tracks formed into a concentric or spiral configuration is divided into a plurality of sectors for selective recording and reproduction of information in any desired sectors. Sector separating zones of predetermined configuration are provided at starting portions of the respective sectors, while predetermined sector marks indicating the sector separating zones are formed on an index track provided at an outer or inner periphery of the disc in positions corresponding to the sector separating zones so that. during selection of the sectors at the recording and reproduction, reproduction signal by the sector marks are used for selection of the sectors, while starting of the recording and reproduction is effected by the reproduced information of the sector separating zones.

    Optical recording and reproducing disc
    8.
    发明公开
    Optical recording and reproducing disc 失效
    光学记录和复制光盘

    公开(公告)号：EP0081138A2

    公开(公告)日：1983-06-15

    申请号：EP82110852.9

    申请日：1982-11-24

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Satoh, Isao ,  Yoshida, Tomio ,  Ohara, Shunji ,  Koishi, Kenji

    IPC分类号： G11B7/00 ,  G11B7/08

    CPC分类号： G11B7/24085 ,  G11B7/00745 ,  G11B7/08517 ,  G11B27/19 ,  G11B27/24 ,  G11B27/3027 ,  G11B27/32 ,  G11B2220/20

    摘要： The disclosure is directed to an optical recording and reproducing disc in which each track circumference of guide tracks formed into a concentric or spiral configuration is divided into a plurality of sectors for selective recording and reproduction of information in any desired sectors. Sector separating zones of predetermined configuration are provided at starting portions of the respective sectors, while predetermined sector marks indicating the sector separating zones are formed on an index track provided at an outer or inner periphery of the disc in positions corresponding to the sector separating zones so that. during selection of the sectors at the recording and reproduction, reproduction signal by the sector marks are used for selection of the sectors, while starting of the recording and reproduction is effected by the reproduced information of the sector separating zones.

    摘要翻译： 本公开涉及一种光学记录和再现盘，其中形成为同心或螺旋结构的导轨的每个轨道周围被分成多个扇区，用于在任何期望的扇区中选择性地记录和再现信息。 具有预定结构的扇区分离区域设置在相应扇区的起始部分，而指示扇区分离区域的预定扇区标记形成在设置在盘的外部或内部圆周处的对应于扇区分离区域的位置处的索引轨道上 那。 在记录和再现时选择扇区期间，扇区标记的再现信号被用于扇区的选择，而记录和再现的开始是通过扇区分离区的再现信息来实现的。